Sphygmomanometer.



C. R. WASER.

SPHYGMOMANOMETER.

APPLICATION FILED SEPT. 19. 1914.

Patented Dec. 21, 1915.

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CARL

WASEB, OF PHILADELPHIA, IENNSYLVANIA, ASSIGNOR T0 PRECISION THERMOMETER. & INSTRUMENT COIEPANY, 0F PHILADELPHIA, PENNSYLVANIA,

. A CORPORATION OF PENNSYLVANIA.

SPHYG1TOMANO1VIETEB. i

- Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed September 19, 1914. Serial No. 862,444.

To. all whom it may concern:

Be it known that I CARL R. WASER, a

"citizen of the United States, residingin the cityof Philadelphia, county of Philadelphia, and State of Pennsylvania. have invented certain Improvements in Sphygmomanometers, of which the following is a specification.

This invention is a sphygmomanometer of improved construction designed to provide an instrument of superior characteristics particularly in the matters of accuracy, simplicity, compactness and stability.

The characteristic features of my invention are disclosed in the following description and the accompanying drawings in illustration thereof.

In the drawings, Figure 1 is a side elevation of an erected instrument embodying my improvements; Fig. 2 is a front elevation of the same; Big. 3 is a side elevation of a-broken section of the same with the parts partially collapsed; Fig. 4 is an enlarged sectional plan view of the collapsed instrument on the line 44 cf Fig.3; and Fig. 5 is a sectional view on the line 5-5 of Fig. 2.

The instrument, as illustrated in the drawings, comprises the case 1 havinga lid 2 hinged by pintles 3, the case having a spring 4'fixed to its bottom at the rear end to engage a catch 5 on the lid to hold the latter in its elevated position the lid being held in its closedposition by the engagement of. a catch 4 on thespring 4 with the catch 5 on the lid.

A metalcistern 6 and the glass tube 7 are connected bv a metal base 8, in which they are set, and these parts are fixed to the interior'face of the lid. The top of the cistern has fixed thereto a fixture 9 adapted for the engagement'of a three way nipple 10 through which it connected with the respective tubes .11 and 12communicating withthe pump 13 and cuff 14.

A hearing 15, fixed'to the lid adjacent to the top'of the tube or tube section 7, holds a'cylindrical clip or seat 16 (provided with the fenestration 16) in which the top of the tube is fixed. The bearing also has fixedthereto the hinge knuckles 17 on opposite sides of the top of the tube and the hinge knuckles 18 projecting inwardly into the recess 2 of the lid. A bearing 19 is provided with the hinge knuckles 20 connected with the knucklesl'? bv the pintles I 21, the bearing carrying the cylindrical seat or clip 22 (provided with the fenestration 22) in which. is fixed the end of the tube or tube section 23 adapted to register with and engage the end of the tube section 7. A hearing 24, fixed to the lid, is provided withsprings 25 having inturned ends 25' for engaging the knuckles 20 and holding the tube 23 in registration and alinement with'the tube 7 the frictional engagement of the springs with the knuckles permitting the latter to be disengaged from the former bv the application of sufficient pressure to the tube 23 in the operation of folding it downwithin the limits of the lid 2.

A valve 26 is provided with the hinge knuckles 27 which are pivotallv connected with the knuckles 18 by the pintle 28 on turn the latter down upon the end of the tube 7 when this is exposed by turning down the tube 23. An arm or'finger 30 proiects from the valve 26 and bears against the adiacent end of the tube 23 when the latter is folded down, the arm being elevated to automatically open the valve by the operation of lifting the tube 23. I

A spring 43 fixed within the forward end of the case en ages the arm 30 to hold the valve 26 securely against the end of the tube 7 when the lid is closed to prevent the possibility of the escape of mercury through the opening of the valve.

' Angular bearings 31 are fixed to the lidv2 and support a scale or scale section 32 pro? vided withbearingi 33 containing slots 33', screws 34 and 35 passing through the slots into the bearings 31 to hold the bearings 33 while permitting limited mo ements thereof. A clamp 36 is mounted on the stud. 35 and is adapted to be turned by the le ver 37 to fix the scale section in position.

The scale section '32 is provided with a hinge knuckle 32 and a scale section 38 is provided with a hinge knuckle 38' connected with the knuckle 32 by a pintle 39, whereby the scale section, 38 may 'be folded down against the-section 32 or erected in registration and alinement therewith.

A loop or clip 40 fixed to the'scale sec-Q tion 38 engages the'tube 23 in relatively movable relation to compensate for the differences in their movements on their respective hinges.

The top of the tube 23 has a threaded ring 41 fixed thereongfor the reception of a cap 42 containing an aperture 42, the cap being adapted for holding a wador disk of cotton, porous skin or the like against the top of the tube to prevent the escape of mercurv while'permitting the passage of air.

, Having described my invention, 1 claim: 7 1. A sphygmomanometer comprising a tube having sections, a hinge whereby one of said sections is adapted to be folded with reference to the other, and means comprising a device movable transversely to the plane of oscillation of the foldingsectic n for holding it in registration with the complementary section.

2. A sphygmomanoineter comprising a tube having complementary sections, a hinge whereby one of said sections is adapted to be folded relatively to the other, and means comprising a spring adapted for engaging a hinge member of the folding section for holding it in registration with the other section. I I

3. ,A sphygmomanometer comprising a case havinga lid,-a fenestrated clip c'onnect ed withsaid .lid, said clip having a hinge knuckle thereon, a tube section having an end setin said clip, a secondfenestrated clip having a hinge knuckle pivotally-connected to said hinge knuckle first named,a second tube section having an end set in the second clip, and a spring fixed to said lid and adapted to engage the knuckleof said second clip to holdsaid second tube section in registration'jwith the tubesection first named;

sphygmomanometer' comprising va case having a lid,a clip with things memb'er fixed to said lid, a tube section having an end set in said clip, a second clip having a hinge member connected to said hinge member first named, a second tube section having an end set in said second clipfand springsfixed to said lid on opposite sides of said tube sections whereby said second tube section is held in registration with said tube section first named. I

6. A sphygmomanoineter comprising: a case having ailid containing a reee'ssa clip fixed to said lid and having a hinge member, a tube section having an end set in said clip, a second clip having a hinge member connected to said hinge member first named, and a valve having a hinge in saidrecess,

said valve being'adapted forclosing the end of said tube section first named; I

7. A sphygmomanometer compris ng La case having'a lid,a tube section fixedto' sald a lid, a-tube section hinged to said tube-section first named, a-valve for closing said-tube section first named, and means in said case into engagement with which/said valve; is moved on closing said, lid, whereby said valve is held in position closing sa d tube "sectionfirst named;

so i

"8. A sphygmomanometer comprising a" case having a lid, a tube section fixed-to'said lld, a complementary tUbG SGGtIOII hinged IBlfltlVGlY tosaid tube section first named,' a scale section, means comprising a clamp con- .nected' with said lid for holding said scale 1 'section' in adjustable-relation to said tube" section first named, and a scale section" hinged to saidtscale'se'ction'firstnamed.

9.'A. sphygmomanometer comprising a manometer tube,.a scale for reading said tube, a'transverse web fixed to said scale, a supporting device having a webparallel 1 to said web first named, andmeans for clamping said webs together.

-1O.'A-- sphygmoinanometer comprising i a a case having'a lid, a'tube section fixed to said lid, a tube section hinged to saidgtu-besection firstinamedya scale section fixed to said lid, ascale-section hingedto said scale section first named, and means forconnecting said hinged tube andscale sections to permit one to, move relatively to the other; 4 I

11. A" sphygmomanometer comprising a casing havinga -lid,'a tube section fixed to ios said lid, a spring fixed to said casing, a

device fixed to said lid and. engaging said spring for holding said lid-in the open positionya'nd aclevicerfixed vto said lid and engaging said spring for holding said 'lid in; the closed position.

121A sphygmomanometer comprising i 1 a casin havin rv a'lid a tube section fixed to b h ,5 i

said lid, a spring'havingia 'head fixed to said cas ng, and a catch connected with saidlid' aiidadaptedfor engaging said -.headto' hold saidlid in the closed position. Yr

13. A sph-ygmomanometer havinga read-l ingtube comprisingtwo sections and" means comprising a-hinge' for connecting said sec-:

t'ions in flexible relation, said hinge having connected connected 7 an offs;

1,164,896 I v a set from the respective tube sections, in commy name this 17th; day of September, 1914,

bination with a reading scale comprising in the presence of the subscribing witnesses. two sections and means comprising a hinge for connecting the sections of said scale, 7 CARL WASER' 5 said hinge last named disposed between the Witnesses:

complementary knuckles aforesaid. Jos. G. DENNY, J12,

In testimony whereof I have hereunto set C. N. BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. O. 

